The polarimetric behavior of the diffracted field from an object located close to the ground is investigated for a varying incidence angle. Here, the field is described by the geometrical theory of diffraction in accordance to its asymptotic formulas. As a result, a ray system composed of 13 different rays was implemented for the monostatic case by applying the principle of Fermat. The different spatial and creeping waves give a physical insight in the mechanisms involved in the entire scattering process. By varying the angle from perpendicular to grazing incidence 0°–90°, geometrical surface shadow boundaries are present for the backscattered field. At such boundaries, the spatial waves are replaced by their corresponding creeping waves, leading to a strong attenuation. The diffracted field for look angles related to the transition zones has a characteristic polarimetric behavior, which can be represented on the PoincarÉ sphere. The typical locations on the sphere can be exploited to get information about the geometrical parameters of the target and its height above the ground.


    Access

    Download


    Export, share and cite



    Title :

    Investigations on the Polarimetric Behavior of a Target Near the Soil


    Contributors:

    Published in:

    Publication date :

    2006-10-01



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Investigations on the Polarimetric Behavior of a Target near the Soil

    Marquart, Nicolas Pascal | German Aerospace Center (DLR) | 2007

    Free access

    Passive polarimetric IR target classification

    Sadjadi, F.A. / Chun, C.S.L. | IEEE | 2001